// Copyright 2015 Microsoft Corporation. All rights reserved.
// This code is governed by the license found in the LICENSE file.

/*---
description: >
    Elements deleted after the call started and before visited are not
    visited
esid: sec-array.from
---*/

var originalArray = [0, 1, -2, 4, -8, 16];
var array = [0, 1, -2, 4, -8, 16];
var a = [];
var arrayIndex = -1;

function Test() {
  originalArray = [0, 1, -2, 4, -8, 16];
  array = [0, 1, -2, 4, -8, 16];
  a = [];
  arrayIndex = -1;
  function mapFn(value, index) {
    this.arrayIndex++;
    assert.sameValue(value, array[this.arrayIndex], 'The value of value is expected to equal the value of array[this.arrayIndex]');
    assert.sameValue(index, this.arrayIndex, 'The value of index is expected to equal the value of this.arrayIndex');

    array.splice(array.length - 1, 1);
    return 127;
  }


  a = Array.from(array, mapFn, this);

  assert.sameValue(a.length, originalArray.length / 2, 'The value of a.length is expected to be originalArray.length / 2');

  for (var j = 0; j < originalArray.length / 2; j++) {
    assert.sameValue(a[j], 127, 'The value of a[j] is expected to be 127');
  }
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
   const globalObject = this;
   globalObject.Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
   const globalObject = this;
   globalObject.Test();
}